but they really break down into two cases. first, challenges involving the federal defense of marriage act, a key provision defines marriage for all federal purposes as between a man and a woman. and then the second set involves california's proposition 8. that proposition bannedded same sex marriage in california. >> brown: wading into an area where states are voting all the time on. >> absolutely. railroad referendums on a number of state ballots involving same sex marriage. >> brown: just a couple of other cases we might see. civil rights. voting rights act of 1965. >> yes. there are challenges to what is considered the crown jewel of the civil rights movement. section 5 of the 1965 voting rights act requires jurisdictions that have a history of past discrimination in voting to get pre-approval from the justice department or a federal court in washington whenever they make changes in their voting practices. that secon... that section is bg challenged in two cases although the court hasn't said it would review them. also we may see section 5 being challenged in cases involving voter i.d. laws.